CN113882863A - Construction method of underground complex frame shear structure based on BIM technology - Google Patents
Construction method of underground complex frame shear structure based on BIM technology Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 180
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Abstract
The invention relates to the technical field of building construction, in particular to a construction method of an underground complex frame shear structure based on a BIM technology, which comprises the following steps: utilizing BIM modeling software to carry out three-dimensional modeling on the underground frame shear structure, designing split modules, enabling the structures of the split modules to be mutually independent, enabling the split modules to at least comprise a middle core area module and two side auxiliary area modules, carrying out split design on a ground cushion layer and a top plate in the underground frame shear structure to form a ground cushion layer split body and a top plate split body, determining the specification and the number of the split bodies and sleeved interfaces, and prefabricating in advance; carrying out earthwork excavation and pilot pit construction from any one side of the auxiliary area modules at the two sides, and then carrying out earthwork excavation construction on the middle core area; by adopting the construction method of the underground complex frame shear structure in the technical scheme, disturbance caused by large-range excavation of weak surrounding rocks is reduced; effectively preventing the collapse of the tunnel face and the collapse of the vault.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of an underground complex frame shear structure based on a BIM (building information modeling) technology.
Background
The BIM technology (Building Information Modeling) is generally translated into a Building Information model. As a new idea of the engineering construction industry, the BIM technology emphasizes the application of coordinated and consistent information in each stage of the whole life cycle of an engineering project, and the most intuitive expression form of the BIM technology is a three-dimensional building model with project information. The three-dimensional building information model is not a invariable display product any more, but becomes an intelligent information carrier, and along with the enrichment and transmission of information, the model becomes the core and data foundation of the specific application of each stage of the whole life cycle of a project.
With the gradual popularization of the BIM technology in the building engineering, more and more design units, construction units and owners begin to use the technology, which becomes the development trend of informatization of the building industry. However, in the construction process flow of the underground complex frame-shear structure in the tunnel, for example, in the construction of the complex frame-shear structure of the underground two-layer sewage treatment plant by the project of the wastewater treatment plant of Huaizhou new city, which is a medium-built underground space limited company, the arrangement of the ground cushion layer and the top plate in the frame-shear structure is complex, and the number of reserved holes and grooves is large, and wiring and pipeline connection are usually required, so that more limited space is formed, the construction difficulty is large, and the construction period is short.
The underground frame-shear structure in the tunnel usually adopts a two-dimensional CAD building and a structure construction drawing which are issued by a design institute, although the two-dimensional CAD drawing can also be used for constructing the frame-shear structure, the two-dimensional CAD drawing is easy to miss in the construction and construction of the traditional two-dimensional drawing and cannot intuitively express the form and the position of a constructed object, especially under the condition of multiple complex structural parts and reserved positions, the information data of the frame-shear structure cannot be clearly and completely expressed, and more plane drawings are easy to cause the missing modeling in space and the difficulty to be increased.
In the construction process in the prior art, the whole earthwork is excavated according to the experience by constructors with abundant construction experience, but tunnel face collapse and vault collapse are caused by large disturbance caused by large-range excavation of surrounding rocks due to weak surrounding rock strength, so that the construction difficulty is high, and large potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the technical defects of high construction difficulty and large potential safety hazard in the conventional integral earthwork excavation process in the construction process of the original underground frame shear structure, and adopts the BIM technology to carry out three-dimensional modeling on the underground frame shear structure and determine the design and the coding diagram of the underground frame shear structure.
In order to solve the technical problem, the construction method of the underground complex frame shear structure based on the BIM technology comprises the following steps:
(1) a data preparation step, namely obtaining data information of the underground frame-shear structure according to an underground frame-shear structure two-dimensional CAD building structure construction drawing provided by a design institute; the two-dimensional CAD building structure construction drawing is a split module design drawing and at least comprises a middle core area module and two side auxiliary area module design drawings;
(2) building a BIM digital model, namely building the BIM digital model for the underground frame shear structure by using BIM modeling software, and inputting the acquired data information into a three-dimensional model of the underground frame shear structure to generate a construction operation model;
(3) the split module modeling step, wherein the structures of the split modules are mutually independent, and the split modules, the middle core area module and the two side auxiliary area modules adopt a sleeving connection mode; the core area module bears a main body supporting structure;
(4) the construction steps are as follows,
(4-1) firstly building a advance support, and then excavating a pilot tunnel from any one side of the auxiliary area modules at the two sides;
(4-2) constructing a ground cushion layer on the auxiliary area, and arranging a pilot tunnel partition wall on the periphery of the pilot tunnel;
(4-3) constructing a top plate of the auxiliary area, binding steel bars, erecting a supporting template of the top plate of the auxiliary area, and watering and maintaining after concrete is poured;
(4-4) then, carrying out earth excavation on the middle core area;
(4-5) then removing the said pilot tunnel partition wall;
(4-6) then, constructing a ground cushion layer on the middle core area;
(4-7) constructing a top plate in the middle core area, binding reinforcing steel bars, erecting a supporting template of the top plate in the middle core area, and watering and curing after concrete is poured;
(4-8) then starting to construct waterproof construction for the SBS coiled material;
(4-9) after the construction of the coiled material is finished, starting the construction of the waterproof protective layer;
and (4-10) after the construction of the protective layer is finished, maintaining and designing and wiring according to a drawing.
By adopting the construction method of the underground complex frame shear structure in the technical scheme, as 1) the segmental excavation is adopted, the disturbance caused by the large-range excavation of the weak surrounding rock is reduced; the pilot tunnel is used as an advanced geological exploration channel, which is beneficial to mastering the geological condition in front of the tunnel face; 2) the reserved core area soil is utilized to play a role in supporting the tunnel face; 3) arranging a pilot tunnel partition wall which is used as a partition boundary of the partial excavation of the pilot tunnel on the one hand; on the other hand, the pilot tunnel partition wall and the core soil form a whole body to play a role of vertical temporary support, so that the using amount of steel and sprayed concrete is reduced, the construction cost is reduced, tunnel face collapse and vault collapse are effectively prevented, the effects on the structural quality, the construction safety and the engineering progress are obvious, and good economic benefit and social benefit are obtained; 4) the usage of the pilot tunnel partition wall is small, the demolition is convenient, the speed is high, and the construction speed can be increased by about 20 percent.
In addition, the construction period is shortened in the guiding construction by using the BIM digital creation model. The complex frame shear structure part of the underground sewage treatment plant, the digital model provides a visual three-dimensional physical effect picture, the difficulty and time of plane drawing space modeling can be reduced, the reasonable arrangement of construction processes and resources is promoted, the rework is avoided to the greatest extent, and the construction period is shortened; the construction quality is improved in the process of guiding construction by utilizing the BIM digital creation model, a two-dimensional drawing is converted into a three-dimensional dynamic model through BIM technical software, the part of a complex frame shear structure is simulated, the geometric information, the physical information, the rule information and the like of a component are accurately mastered, the construction scheme can be optimized, the possibility of error and leakage in the construction process is reduced, and the construction quality is improved; the BIM digital creation model is utilized to save the cost in the guidance construction; in the construction of the complex frame shear structure, the part to be constructed is visually matched with the participating whole members by applying a three-dimensional dynamic model, so that the method is visual, vivid and accurate, reduces the labor and material resource loss and the probability of reworking caused by construction errors, and is beneficial to construction cost control; improving the enterprise project management level in the construction guidance by utilizing a BIM digital creation model; in the construction implementation stage of the complex frame shear structure, the BIM model is visually and vividly displayed on project management personnel, so that the problems of safety, quality, technology, progress, cost, management and the like in the construction process can be effectively reduced, and the project management level is improved.
In the step (1), the two-dimensional CAD building structure construction drawing also comprises a ground cushion layer and a top plate design drawing, wherein the ground cushion layer and the top plate design form ground cushion layer partition bodies and top plate partition bodies, and the partition bodies are sleeved and connected and respectively encode different partition bodies; and (3-1) a partition body module modeling step is additionally arranged between the (3) split module modeling step and the (4) construction step, and a ground cushion layer and a top plate in the underground frame shear structure are subjected to partition design to form interfaces for determining the specification and the number of the partition bodies and sleeving, so that the partition bodies are prefabricated in advance.
In order to ensure the final construction effect and ensure the close connection of the later construction process flow, preferably, in the step (2), the step of creating a BIM digital model is performed with conflict check, after internal check, if the conflict does not occur, the construction operation model is generated, if the conflict occurs, the step of creating the BIM digital model is returned, the BIM digital model is re-created, further, optimization and limitation are performed, in the step (2), after the construction operation model is generated, staged achievement reception is performed, if the design check is unqualified, the drawing is subjected to review, the data preparation step is returned, and if the design check is qualified, the final construction operation model is generated for guiding the site construction.
For the same reason, preferably, in the step (3), the construction simulation is performed after the split module design, after the internal audit, if the conflict occurs, the step of creating the BIM digital model is returned, the split module design is performed again, if the conflict does not occur, the construction operation model is generated, further, the optimization limitation is performed, in the step (3), after the construction operation model is generated, the staged achievement reception is performed, if the audit by the construction department is not qualified, the construction scheme data is determined, the data preparation step is returned, and if the audit by the construction department is qualified, the final construction operation model is generated, the construction drawing technical background is formed, and the implementation construction is organized.
In the same way, preferably, in the step (3-1), model segmentation processing is performed after the design of the division bodies, after internal examination, if conflict occurs, the step of building a BIM digital model is returned, the division body design is re-divided, if conflict does not occur, further, optimization and limitation are performed, in the step (4), after the construction effect diagram is generated, staged result reception is performed, if the examination of the construction department is unqualified, the construction drawing is determined, the data preparation step is returned, and if the examination of the construction department is qualified, the final construction model effect diagram is generated, so that the technical background of the construction model is formed, and the field construction is organized.
In addition, in order to accelerate the construction progress, the earthwork excavation pilot pit and the construction can be synchronously performed on the auxiliary area modules at the two sides in the steps (4-1), (4-2) and (4-3).
Further, constructing in a way of prefabricating ground cushion layer segments and top plate segments, namely limiting in the step (4-2), wherein the ground cushion layer construction of the auxiliary area is carried out according to the ground cushion layer segments prefabricated in the area, and a ground cushion layer interface sleeved with the middle core area module is reserved; in the step (4-3), the top plate is connected according to the top plate dividing bodies prefabricated in the region, and a top plate interface sleeved with the middle core region module is reserved; in the step (4-6), the ground cushion layer division bodies prefabricated according to the region are connected, and the ground cushion layer interfaces which are reserved correspondingly are butted; and (4-7) connecting the prefabricated top plate split bodies according to the areas, and butting the top plate split bodies corresponding to the reserved top plate interfaces.
Drawings
FIG. 1 is a schematic diagram of the construction deepening design of the present invention;
FIG. 2 is a schematic diagram of a simulation of the construction scheme of the present invention;
fig. 3 is a schematic diagram of construction of a known complex frame shear structure.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
In a first embodiment, a method for constructing an underground complex frame-shear structure based on a BIM technique by using a cast-in-place manner as shown in fig. 1, 2 and 3 includes the following steps:
(1) a data preparation step, namely obtaining data information of the underground frame-shear structure according to an underground frame-shear structure two-dimensional CAD building structure construction drawing provided by a design institute; the two-dimensional CAD building structure construction drawing is a split module design drawing and at least comprises a middle core area module and two side auxiliary area module design drawings; (2) a step of building a BIM digital model, which is to build the BIM digital model for the underground frame shear structure by using BIM modeling software, input the acquired data information into a three-dimensional model of the underground frame shear structure to generate a construction operation model, carry out conflict check after building the BIM digital model in the step (2), generate the construction operation model if no conflict exists after internal check, return to the step of building the BIM digital model if the conflict occurs, re-build the BIM digital model, receive stage results after generating the construction operation model in the step (2), if the design check is unqualified, carry out review on a drawing, return to the step of data preparation, and if the design check is qualified, generate a final construction operation model for guiding field construction; (3) the method comprises a split module modeling step, wherein structures of all split modules are mutually independent, and the middle core area module and the auxiliary area modules at the two sides adopt a sleeving mode; the core area module bears a main body supporting structure; in the step (3), construction simulation is carried out after split module design, after internal audit, if conflict occurs, the step of building a BIM digital model is returned, the split module design is carried out again, if conflict does not occur, a construction operation model is generated, in the step (3), after the construction operation model is generated, staged result receiving is carried out, if the audit of a construction department is unqualified, construction scheme data is determined, the step of data preparation is returned, and if the audit of the construction department is qualified, a final construction operation model is generated, a construction drawing technical settlement is formed, and implementation construction is organized;
(4) the construction steps are as follows,
(4-1) firstly building a advance support, and then excavating a pilot tunnel from any one side of the auxiliary area modules at the two sides;
(4-2) constructing a ground cushion layer on the auxiliary area, and arranging a pilot tunnel partition wall on the periphery of the pilot tunnel;
(4-3) constructing a top plate of the auxiliary area, binding steel bars, erecting a supporting template of the top plate of the auxiliary area, and watering and maintaining after concrete is poured;
(4-4) then, carrying out earth excavation on the middle core area;
(4-5) then removing the said pilot tunnel partition wall;
(4-6) then, constructing a ground cushion layer on the middle core area;
(4-7) constructing a top plate in the middle core area, binding reinforcing steel bars, erecting a supporting template of the top plate in the middle core area, and watering and curing after concrete is poured;
(4-8) then starting to construct waterproof construction for the SBS coiled material;
(4-9) after the construction of the coiled material is finished, starting the construction of the waterproof protective layer;
and (4-10) after the construction of the protective layer is finished, maintaining and designing and wiring according to a drawing.
In a second embodiment, a method of combining in-situ casting and prefabrication is adopted, as shown in fig. 1, 2 and 3, the construction method of the underground complex frame-shear structure based on the BIM technology includes the following steps:
(1) a data preparation step, namely obtaining data information of the underground frame-shear structure according to an underground frame-shear structure two-dimensional CAD building structure construction drawing provided by a design institute; the two-dimensional CAD building structure construction drawing is a split module design drawing and at least comprises a middle core area module and two side auxiliary area module design drawings, and also comprises a ground cushion layer and a top plate design drawing, wherein the ground cushion layer and the top plate design form a ground cushion layer partition body and a top plate partition body, and the partition bodies adopt a sleeving connection mode and respectively code different partition bodies; (2) a step of building a BIM digital model, which is to build the BIM digital model for the underground frame shear structure by using BIM modeling software, input the acquired data information into a three-dimensional model of the underground frame shear structure to generate a construction operation model, carry out conflict check after building the BIM digital model in the step (2), generate the construction operation model if no conflict exists after internal check, return to the step of building the BIM digital model if the conflict occurs, re-build the BIM digital model, receive stage results after generating the construction operation model in the step (2), if the design check is unqualified, carry out review on a drawing, return to the step of data preparation, and if the design check is qualified, generate a final construction operation model for guiding field construction; (3) the method comprises a split module modeling step, wherein structures of all split modules are mutually independent, and the middle core area module and the auxiliary area modules at the two sides adopt a sleeving mode; the core area module bears a main body supporting structure, a partition body module modeling step (3-1) is additionally arranged between the split module modeling step (3) and the construction step (4), and a ground cushion layer and a top plate in an underground frame shear structure are subjected to partition design to form interfaces for determining the specification, the number and the sleeving connection of the partition bodies, so that the partition bodies are prefabricated in advance; in the step (3), construction simulation is carried out after split module design, after internal audit, if conflict occurs, the step of building a BIM digital model is returned, the split module design is carried out again, if conflict does not occur, a construction operation model is generated, in the step (3), after the construction operation model is generated, staged result receiving is carried out, if the audit of a construction department is unqualified, construction scheme data is determined, the step of data preparation is returned, and if the audit of the construction department is qualified, a final construction operation model is generated, a construction drawing technical settlement is formed, and implementation construction is organized;
(4) the construction steps are as follows,
(4-1) firstly building a advance support, and then excavating a pilot tunnel from any one side of the auxiliary area modules at the two sides;
(4-2) then, carrying out ground cushion layer construction on the auxiliary area, wherein the ground cushion layer construction of the auxiliary area is carried out according to the ground cushion layer dividing bodies prefabricated in the area, a ground cushion layer interface sleeved with the middle core area module is reserved, and a pilot pit partition wall is arranged on the periphery of the pilot pit;
(4-3) constructing a top plate of the auxiliary area, binding reinforcing steel bars, erecting a supporting template of the top plate of the auxiliary area, pouring concrete, watering and curing, connecting the top plate according to the top plate partition prefabricated in the area, and reserving a top plate interface sleeved with the middle core area module;
(4-4) then, carrying out earth excavation on the middle core area;
(4-5) then removing the said pilot tunnel partition wall;
(4-6) then, constructing a ground cushion layer on the middle core area, connecting the ground cushion layer segments prefabricated according to the area, and butting the ground cushion layer segments correspondingly with the reserved ground cushion layer interfaces;
(4-7) constructing a top plate in the middle core area, binding reinforcing steel bars, erecting a supporting template of the top plate in the middle core area, pouring concrete, watering and curing, connecting according to the top plate partition bodies prefabricated in the area, and butting corresponding reserved top plate interfaces;
(4-8) then starting to construct waterproof construction for the SBS coiled material;
(4-9) after the construction of the coiled material is finished, starting the construction of the waterproof protective layer;
and (4-10) after the construction of the protective layer is finished, maintaining and designing and wiring according to a drawing.
By adopting the technical scheme of the invention, the tunnel face collapse and vault collapse can be effectively prevented in the tunnel construction process, the effects on the aspects of structural quality, construction safety and engineering progress are obvious, and good economic benefits and social benefits are obtained, the construction method follows the principles of pipe advancing, tight grouting, short excavation, strong supporting, early sealing and duty measurement according to the 'New Austrian' principle, and the main principle is as follows: excavating in parts, and reducing disturbance caused by large-range excavation of weak surrounding rocks; the pilot pit is used as an advanced geological exploration channel, which is beneficial to grasping the geological condition in front of the face, the reserved core soil is utilized to play a role of supporting the face, and a pilot pit partition wall is arranged to be used as a pilot pit divided excavation partition boundary on the one hand; on the other hand, the vertical guide pit partition wall and the core soil form a whole body to play the role of the vertical guide pit partition wall, so that the frequency of medium and small-sized collapse and local block falling of the tunnel face is effectively reduced, more engineering materials are saved, the construction safety is further improved, and good economic and social benefits are obtained. The construction method is not only suitable for underground excavation construction of general IV-V level surrounding rock sections, fault broken zones and shallow buried stratum tunnels, but also suitable for large-span tunnels broken under the surrounding rock conditions, and obtains good economic and social benefits in the practical engineering application. The method has the advantages that the pilot tunnel partition wall and the core soil form an integral vertical temporary support function, the consumption of steel and sprayed concrete is reduced, and compared with a single-side-wall pilot tunnel excavation method under the same level of surrounding rock, the construction cost is greatly reduced. The upper guide pit interface is horizontal, a construction working platform can be provided, a construction trolley is omitted, the use amount of a guide pit partition wall is small, the dismounting is convenient and fast, compared with a single-side-wall guide pit excavation method under the same-level surrounding rock, the construction speed can be accelerated by about 20%, a rigid guide pit partition wall is arranged, the rigid guide pit partition wall and core soil act together to support the tunnel face and the vault surrounding rock, the guide pit excavation section is small, the stability is easy to control, and the safety is guaranteed.
The construction method of the underground complex frame shear structure based on the BIM technology provided by the invention is described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The construction method of the underground complex frame shear structure based on the BIM technology is characterized by comprising the following steps: the method comprises the following steps:
(1) a data preparation step, namely obtaining data information of the underground frame-shear structure according to an underground frame-shear structure two-dimensional CAD building structure construction drawing provided by a design institute; the two-dimensional CAD building structure construction drawing is a split module design drawing and at least comprises a middle core area module and two side auxiliary area module design drawings;
(2) building a BIM digital model, namely building the BIM digital model for the underground frame shear structure by using BIM modeling software, and inputting the acquired data information into a three-dimensional model of the underground frame shear structure to generate a construction operation model;
(3) the method comprises a split module modeling step, wherein structures of all split modules are mutually independent, and the middle core area module and the auxiliary area modules at the two sides adopt a sleeving mode; the core area module bears a main body supporting structure;
(4) the construction steps are as follows,
(4-1) firstly building a advance support, and then excavating a pilot tunnel from any one side of the auxiliary area modules at the two sides;
(4-2) constructing a ground cushion layer on the auxiliary area, and arranging a pilot tunnel partition wall on the periphery of the pilot tunnel; (4-3) constructing a top plate of the auxiliary area, binding steel bars, erecting a supporting template of the top plate of the auxiliary area, and watering and maintaining after concrete is poured;
(4-4) then, carrying out earth excavation on the middle core area;
(4-5) then removing the said pilot tunnel partition wall;
(4-6) then, constructing a ground cushion layer on the middle core area;
(4-7) constructing a top plate in the middle core area, binding reinforcing steel bars, erecting a supporting template of the top plate in the middle core area, and watering and curing after concrete is poured;
(4-8) then starting to construct waterproof construction for the SBS coiled material;
(4-9) after the construction of the coiled material is finished, starting the construction of the waterproof protective layer;
and (4-10) after the construction of the protective layer is finished, maintaining and designing and wiring according to a drawing.
2. The BIM technology-based underground complex frame shear structure construction method according to claim 1, wherein: in the step (1), the two-dimensional CAD construction structure construction drawing also comprises a ground cushion layer and a top plate design drawing, wherein the ground cushion layer and the top plate design form ground cushion layer partition bodies and top plate partition bodies, and the partition bodies are sleeved and connected and respectively encode different partition bodies; and (3-1) a partition body module modeling step is additionally arranged between the (3) split module modeling step and the (4) construction step, and a ground cushion layer and a top plate in the underground frame shear structure are subjected to partition design to form interfaces for determining the specification and the number of the partition bodies and sleeving, so that the partition bodies are prefabricated in advance.
3. The BIM technology-based underground complex frame shear structure construction method according to claim 1, wherein: in the step (2), conflict check is carried out after the BIM digital model is created, after internal audit, if no conflict exists, the construction operation model is generated, and if conflict occurs, the step of creating the BIM digital model is returned, and the BIM digital model is created again.
4. The BIM technology-based underground complex frame shear structure construction method according to claim 3, wherein: and (3) in the step (2), after the construction operation model is generated, receiving stage results, if the design verification is unqualified, performing joint verification on the drawing, returning to the data preparation step, and if the design verification is qualified, generating a final construction operation model for guiding field construction.
5. The BIM technology-based underground complex frame shear structure construction method according to claim 1, wherein: in the step (3), construction simulation is carried out after the split module design, after internal audit, if conflict occurs, the step of building the BIM digital model is returned, the module design is split again, and if the conflict does not occur, a construction operation model is generated.
6. The BIM technology-based underground complex frame shear structure construction method according to claim 5, wherein: and (3) after the construction operation model is generated, receiving stage results, determining construction scheme data if the construction department is unqualified in audit, returning to the data preparation step, and generating a final construction operation model if the construction department is qualified in audit to form a construction drawing technical background and organize actual construction.
7. The BIM technology-based underground complex frame shear structure construction method according to claim 2, wherein: in the step (3-1), model segmentation processing is carried out after the design of the split bodies, after internal verification, if conflict occurs, the step of building the BIM digital model is returned, the design of the split bodies is re-split, and if conflict does not occur, a construction effect diagram is generated.
8. The BIM technology-based underground complex frame shear structure construction method according to claim 7, wherein: and (4) after the construction effect graph is generated, receiving stage results, determining the construction drawing if the construction department is unqualified in audit, returning to the data preparation step, and generating a final construction model effect graph if the construction department is qualified in audit to form a construction model technical background and organize field construction.
9. The BIM technology-based underground complex frame shear structure construction method according to claim 2, wherein: in the steps (4-1), (4-2) and (4-3), the auxiliary area modules on the two sides can be synchronously excavated and constructed.
10. The BIM technology-based underground complex frame shear structure construction method according to claim 2, wherein: in the step (4-2), the ground cushion construction of the auxiliary area is carried out according to the ground cushion partition prefabricated in the area, and a ground cushion interface sleeved with the middle core area module is reserved; in the step (4-3), the top plate is connected according to the top plate dividing bodies prefabricated in the region, and a top plate interface sleeved with the middle core region module is reserved; in the step (4-6), the ground cushion layer division bodies prefabricated according to the region are connected, and the ground cushion layer interfaces which are reserved correspondingly are butted; and (4-7) connecting the prefabricated top plate split bodies according to the areas, and butting the top plate split bodies corresponding to the reserved top plate interfaces.
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